Prostozračna optična zveza za prenos zvoka z analogno modulacijo

Rus, Tomaž (author), Batagelj, Boštjan (mentor)

Diplomsko delo predstavlja tehnologijo prostozračne optične povezave. V zadnjem desetletju je bil svet priča ogromnemu povečanju prometa, prenesenega v telekomunikacijskih omrežjih. Na območjih, kjer je postavitev optičnih vlaken nemogoča oziroma predraga, je rešitev prostozračna optična povezava. Za namen diplomske naloge so najprej opisane lastnosti in področja uporabe prostozračnih optičnih zvez. Opisane so sprejemno – oddajne enote ter pregled dejavnikov, ki neposredno vplivajo na prenosno pot. Najbolj so izpostavljeni vremenski vplivi, saj ti največ vplivajo na kakovost prenosa. Opisan je svetlobni spekter v katerem delujejo prostozračne optične komunikacije, nato pa še poglavitna dela teh sistemov. To sta laserska dioda, ki oddaja v bližnjem infrardečem spektru ter fotodioda za sprejem signalov. Zadnji del naloge je namenjen praktičnemu preizkusu, s katerim sem želel predstaviti prostozračno optično zvezo. Z lasersko diodo prenašamo amplitudno moduliran zvok do sprejemne fotodiode.

• Language: Slovenian
• Keywords: prostozračna optična zveza, polprevodniška laserska dioda, fotodioda
• Work type: Undergraduate thesis
• Organization: FE - Faculty of Electrical Engineering
• Year: 2016
• PID: 20.500.12556/RUL-81532
• Publication date in RUL: 12.04.2016

Secondary language

• Language: English
• Title: Free space optical link for sound transmission with analog modulation

Abstract

The following thesis is presenting a technology of the free space optics. In last decade the world has witnessed a huge increase of data traffic transferred in telecommunication networks. Free space optics is a solution in areas where is impossible to put optical fiber or the costs is too high. For the purpose of introductory part of this thesis is to describe features and areas of free space optics. FSO units are shown and described with their transmitters and receivers and a list of factors, which have a direct influence on a data transfer. Weather influences are in particular emphasized, because they mostly impact in the quality of data transfer. Next chapter describes infrared spectrum, in which free space optics operate, and then main parts of these system. These are laser diode for transmitting and photodiode for receiving signals. Practical experiment is covered in the last part of the thesis in which I wanted to present FSO communication. Laser diode transmits amplitude modulated sound to the receiving photodiode.

• Keywords: Free Space Optics (FSO), semiconductor laser diode, photodiode